package com.relytosoft.mizar.analyze.common.utils;

import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.URLUtil;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * @author wss
 * @version 1.0
 * @date 2022/5/16 17:50
 */
public class ImageUtil {

    /**
     * base64字符串转图片
     *
     * @param imgStr
     * @return
     */
    public static byte[] GenerateImage(String imgStr) {
        //对字节数组字符串进行Base64解码并生成图片
        if (imgStr == null) {
            //图像数据为空
            return null;
        }
        BASE64Decoder decoder = new BASE64Decoder();
        //图片的输出流
        OutputStream imageOut = null;
        try {
            //Base64解码
            byte[] b = decoder.decodeBuffer(imgStr);
            for (int i = 0; i < b.length; ++i) {
                if (b[i] < 0) {
                    //调整异常数据
                    b[i] += 256;
                }
            }
            return b;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }


    /**
     * 图片转base64字符串
     *
     * @param imgFilePath
     * @return
     */
    public static String GetImageStr(String imgFilePath) {
        //将图片文件转化为字节数组字符串，并对其进行Base64编码处理
        InputStream in = null;
        byte[] data = null;
        //读取图片字节数组
        try {
            in = new FileInputStream(imgFilePath);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        //对字节数组Base64编码
        BASE64Encoder encoder = new BASE64Encoder();
        //返回Base64编码过的字节数组字符串
        return encoder.encode(data);
    }

    /**
     * url地址转bytes
     *
     * @param uri
     * @return
     */
    public static byte[] urlToBytes(String uri) {
        InputStream inputStream = URLUtil.getStream(URLUtil.url(uri));
        return IoUtil.readBytes(inputStream);
    }
}
